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Home / Cannabis News / Illicit Marijuana Use By Teens Hits Largest 1-year Decrease Since 1975

Illicit Marijuana Use By Teens Hits Largest 1-year Decrease Since 1975

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The percentage of adolescents reporting substance use decreased significantly in 2021, according to the latest results from the Monitoring the Future survey of substance use behaviors and related attitudes among eighth, 10th, and 12th graders in the United States.

In line with continued long-term declines in the use of many illicit substances among adolescents previously reported by the Monitoring the Future survey, these findings represent the largest one-year decrease in overall illicit drug use reported since the survey began in 1975. The Monitoring the Future survey is conducted by researchers at the University of Michigan, Ann Arbor, and funded by the National Institute on Drug Abuse (NIDA), part of the National Institutes of Health.

“We have never seen such dramatic decreases in drug use among teens in just a one-year period. These data are unprecedented and highlight one unexpected potential consequence of the COVID-19 pandemic, which caused seismic shifts in the day-to-day lives of adolescents,” said Nora Volkow, M.D., NIDA director.”

The 2021 survey reported significant decreases in use across many substances, including those most commonly used in adolescence – alcohol, marijuana, and vaped nicotine. The 2021 decrease in vaping for both marijuana and tobacco follows sharp increases in use between 2017 and 2019, which then leveled off in 2020. This year, the study surveyed students on their mental health during the COVID-19 pandemic. The study found that students across all age-groups reported moderate increases in feelings of boredom, anxiety, depression, loneliness, worry, difficulty sleeping, and other negative mental health indicators since the beginning of the pandemic.

  • MarijuanaThe percentage of students who reported using marijuana (in all forms, including smoking and vaping) within the past year decreased significantly for eighth, 10th, and 12th grade students.
    • Eighth graders: 7.1% reported using marijuana in the past year in 2021, compared to 11.4% in 2020
    • 10th graders: 17.3% reported using marijuana in the past year in 2021, compared to 28.0% in 2020
    • 12th graders: 30.5% reported using marijuana in the past year in 2021, compared to 35.2% in 2020

The Monitoring the Future survey is given annually to students in eighth, 10th, and 12th grades who self-report their substance use behaviors over various time periods, such as past 30 days, past 12 months, and lifetime. The survey also documents students’ perception of harm, disapproval of use, and perceived availability of drugs. The survey results are released the same year the data are collected. From February through June 2021, the Monitoring the Future investigators collected 32,260 surveys from students enrolled across 319 public and private schools in the United States.



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